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ctype_xdigit

Check for character(s) representing a hexadecimal digit (PHP 4 >= 4.0.4, PHP 5)
bool ctype_xdigit ( string text )

Checks if all of the characters in the provided string, text, are hexadecimal 'digits'.

Parameters

text

The tested string.

Return Values

Returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.

Examples

Example 426. A ctype_xdigit() example

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<?php
$strings = array('AB10BC99', 'AR1012', 'ab12bc99');
foreach ($strings as $testcase) {
   if (ctype_xdigit($testcase)) {
       echo "The string $testcase consists of all hexadecimal digits.\n";
   } else {
       echo "The string $testcase does not consist of all hexadecimal digits.\n";
   }
}
?>

The above example will output:

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The string AB10BC99 consists of all hexadecimal digits.
The string AR1012 does not consist of all hexadecimal digits.
The string ab12bc99 consists of all hexadecimal digits.


See Also
ctype_digit()


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